Op-amp Saw tooth generator

I needed a circuit with op-amps for saw tooth waveform generation, I came through the following circuit and modified it according to my requirements.The circuit worked fine in simulation, but practically when I mounted It gave a triangular instead of saw tooth waveform ,and frequency was a little less

I tried playing with resistance R1 that could make it more saw tooth insead of triangular by reducing it, and with resistance R2 increasing it. But reducing it resulted in distorted waveform and increasing R1 increased the frequency and made it more triangular whereas. Changing R2 didn't had much significant of an effect.What could be the problem?

But I am having the problem that discharge time doesn't get smaller !It remains equal and what I get is a triangular waveform.
The discharge and charge time remain equal even with the resistor ratio 20k/1k charging Discharging respectively

The frequency of circuit changes with changing resistances but the duty cycle doesn't!

just a question, why do you have both Vcc positive and negetive pins to a positive charge on the schematic? To my knowledge, one side needs to be -5v, and the other +5V.

Edit: for example. have two 5v batteries in series. declare the node between the two batteries in series as ground. connect the negative side of the battery pack to the -Vcc and the postitive to the +Vcc.

Your schematic should have one of the positive side of the 5v power supply pins connected to ground, and the negative side connected to -Vcc on the Op Amp. Looking up LM353....

just a question, why do you have both Vcc positive and negetive pins to a positive charge on the schematic? To my knowledge, one side needs to be -5v, and the other +5V.

Edit: for example. have two 5v batteries in series. declare the node between the two batteries in series as ground. connect the negative side of the battery pack to the -Vcc and the postitive to the +Vcc.

Your schematic should have one of the positive side of the 5v power supply pins connected to ground, and the negative side connected to -Vcc on the Op Amp. Looking up LM353....

It is LF353 and yes its a dual op-amp in one Ic.This is for simulations , and as there is no built in pscpice model for LF353 so I made it and it is appearing as. The circuit is done with both opamps beng used in one IC.